World's Longest Robotic Lego Ball Trail

According to a link in the MAKE
magazine blog, Lego fanatics have come
up with a standard module
design for robotic Lego ball trails. Lego builders from all over the
world are building modules. Each module handles balls at one per second
and has standardized in and out points. At BrickFest 2005, all the modules
will be assembled into the world's largest ball trail, called The Great Ball
Contraption. Photos and video of
a 10 module test assembly are available online. The originators of the
idea have started a list of
modules that will be present at BrickFest.